Carl a



UNITED STATES (JAl-tL AUl llt l\' \Vl llfilihilll, OF VIENNA,AUS'lltlA-lillNtjAilY.

GAS-INCANQESCENT.

SPECIFICATION forming part of Letters Patent No. 359,524, dated March15, 1887 Application tiled December 7,1885, Serial No, 185,653!v inBelgium No l3, 1e80, No.

unhcr 4, 1885, No. 70,730; in England November '1, 188.7,No.13,312,Decemberl2, 188:7,No. 15,2.

; in Italy Fehl'unry It, I886, XXXVIII, 310, and October 13, 1886, XL,115; in Cape of (loud ll'ope him-ch 1,

PATENT Orrica ('N'o specimens.) latcntcd in France Novmnlu-r 1, 188:7,No. 11:1,ut'l;

,und lllurrh 1886, No, 6/203; in Victoria March [7,1886, No. 4,472;indasmuniaMarch 24, 1886,No. 308/0; in South Australia Mnyi}, biz-G, No,678; in New South Wales May l1,]8t'6,1\'o. LEEJH/il; in New Zcnlnnd Junell, 1886, No. l,l'-' ll1i;in Qum-nslundflunc :8, 1886, No.1(lli; inFinland July 10, 1686, No. 26!; in Spain August I0, 1886, No.0,011/5,858; in "Norway August 1886,31

88. and in India Sulllt'llllllbl'il, 1866, No. -l0/l,'l-l3.

To (LZZ whom it may concern:

it known that I, CARI, Aunu vox Wins- Bxon, a subject of the 'l lmperorof Austria, rcsiding at \"icnna,in the Empire ofAustriallungary, haveinvented new and useful Improvements in Incandescent Burners for Gas,(for which I have obtained patents in l ranceulated November-4, 1885,No. 172,064; Belgium, dated November 4, 1885, No. 70,789; Italy, datedFebruary 23, 1886, Vol. XXXVIII, No. 310; France, Certificate ofAddition, dated April 22, 1886, No. 172,064; Belgium, Certificate ofAddition, dated September 9, 1886, No. 74,502; Spain, dated Augustl 0,1886,1fl'o. 9, 031/ 5,858; Italy, Certificate of Addition, dated October13, 1886, Vol. XL, No. 415; Finland, dated July 10, 1886, No. 261;Norway, dated August 25, 1886, No. 88; Victoria, dated March 17, 1886,No, 4,472; New South Wales, dated llay 11, 1886, No. 1,829/2; Tasmania,dated March 24, 1886, No. 898/9; Queensland, dated June 28, 1886, No.106; New Zealand, dated June 11, 1886, No. 1,863; Cape of Good Hope,dated March 4, 1886, No. 6/205; India, dated September 2, 1886, No. 40/1,145; South Australia, dated May 3, 1886, No. 678; Great Britain, datedNovemberat, 1885,No. 13,3162 and December 12, 1885, No. 15,286, andGreat Britain by application for patent dated March 18, 1886, No.3,592,) of which the following is a specification.

It has heretofore been proposed to use refractory earth and platinum orother wires or filaments made of infnsible n1aterialsuch as magnesia inthe manufacture of devices adapted to be heated to incandesccnce by thename from a gasbnrner, such devices being now known in the art asincandescent burners, for the purpose of increasing theilluminating-power of gas.

My invention has for its object to provide a novel compound for makingdurable and efficientincandescent burners for gas; and to such end itconsists in the combined properties of oxide of lanthanum, oxide ofyetrium, and oxide of zirconium, which I have discovered to be veryvaluable as an illuminant when rcndered incandescent by the flame from agasburncr. The combined properties of these oxides in a finely-dividedcondition produce the following results: First, if heated by the flamefrom any ordinary gas-burner, ahighlyintense, almost white, light isobtained; second, the substances are incombnstible and infusiblc, and donot volatilize; third, the suit stances do not produce scale or ashafter burniug several hundreds of hours, nor do they evince any decreaseof power of oinitlance, but remain altogether perfect; fourth, thesubstances can without any change be exposed for any length of time tothe influence of atmospheric air so long as the latter is in a conditionfor inhalation.

The proportions of the oxides may be varied; but I have found thefollowing to give very satisfactory results where all three of theoxides are employed, to Wit: oxide of zirconium, sixty per cent.; oxideof lanthanum, twenty per cent; oxide of yctrium, twenty per cent.

The combined substances may be employed in connection with gas-burnersinvarious Ways. For example, the burner may be composed of a tubularskeleton hood, cap, or frame suspended over the flame of the gasbnrner,so as to become heated by such flame to incandcs cence, causing it togive out great and brilliant light. The hood may be made of lightnet-work fabric or threads-such as cotton impregnated with a solution ofthe salts of the combined substances named and then exposed to heat,

Patent filed J one 8, 1886, Serial No. 204,588.

I am aware that it has been proposed to use zirconia in makingconductors to form the illuminant-s of incandescent electric lamps; but

such is not my invention, usibeonsisbsinn com- 2. An incandescent burnerfor gas, consistponnd composed oi'tihe oxides menbioned tohe ing 01. askeleton hood or frame composed 01' undo into :1 hood or frzune nndplnced over nnd the oxide of lnnbhnnum, oxide of yetrium, and x renderedincnndesoenl; by (he henbof the [hune oxideoi' zirconium, substantiallyas described.

5 from n gas-burner. [n witness whereof I have hereunto signed 'ih'wingLhns demzribed my inventioinwlmi; I my name in the presence of twoSubscribing claim is witnesses.

I]. A emnpoul'id for inoimdesconh burners, CARI) AUJ'JH- VON WIHJSBACIL(:oi'lsisiiing ol' the oxide of lziniiimnnln, oxide of \Vitnesses: IOyCilJ'il'llU, and oxide 01' ziruoniuln, snbslunbinlly VrorrojnTISOlILI-lh,

as described. .TonA NN DOLL.

It is hereby certified that in Letters Patent No. 359,524, granted March15,1887,

upon the application of Carl Auer von Welshach, of Vienna,Austria-Hungary, for an improvement in Gaslncandescent, errors appear inthe printed specification requiring correction, as follows: On page 1,in lines 44 and 68, and on page 2, 1iues 10 and 15,

the word yetriutn should read yttrium and that the Letters Patent shouldbe read with these corrections therein that the same may conform to therecord of the ease in the Patent Oflice.

Signed, countersigned, and sealed this 3d day of May, A. D. 1887.

[SEAL] D. L. HAWKINS,

Acting Secretary of the Interior.

Counter-signed BENTON J. HALL,

Commissioner of Patents.

